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08
2026
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07
Excitons, Two-Dimensional Magnetic Semiconductors | Nature Materials
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Two-dimensional magnetic semiconductors offer a unique platform in which long-range magnetic order coexists with strongly bound excitons. Because both the excitonic state and the magnetic moment originate from the same electronic orbitals and are coupled via intrinsic exchange interactions, optical excitation in these systems exhibits remarkable sensitivity to magnetic ordering. Recent experiments have demonstrated exceptionally strong magneto‑optical responses and direct exciton–magnon coupling, opening new avenues for manipulating light–matter interactions through the spin degree of freedom.
Recently, Pratap Chandra Adak, Vinod M. Menon, and others from the City College of New York published a review article in Nature Materials. The paper summarizes recent experimental findings and theoretical frameworks concerning exciton–magnon interactions in two-dimensional van der Waals magnetic semiconductors—such as CrI₃, NiPS₃, and CrSBr. It discusses the latest advances in exciton‑enhanced magneto‑optical effects, exciton–magnon dynamical coupling, and magnetic exciton polaritons, while also outlining the potential applications of this platform in quantum sensing and spin–photon conversion.
Excitons in van der Waals magnetic materials. Excitons in van der Waals magnetic materials.
Figure 1: Exciton–magnetic coupling and tunability in two-dimensional van der Waals magnetic materials
Figure 2 | Crystal structures and magnetic ordering of representative two-dimensional magnets
Figure 3: Hybrid exciton eigenstates in two-dimensional magnetic semiconductors
Figure 4 | Interaction between excitons and the magnetic ground state
Figure 5 | Exciton–magnon coupling in CrSBr
Figure 6 | Strong Light–Matter Coupling
Source: Today’s New Materials
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